Heel and method of making the same



Sept. 27, 1927. A. L CLAPP HEEL AND Msmob or MAKING THE sum Filed March7. 1924 Patented Sept. 27, 1927.

. UNITED STATES PATENT- oar-ruin,

ALBERT L. GLAIPIP, OF DANVERS,

racruamo COMPANY, or BOSTON, MASSACHUSETTS, a CORPORATION or massacnusnr'rs.

HEEL AND METHOD OF MAKING THE SAME.

,. Application and larch r, 1924. Serial No.- aemas.

-This invention relates to the manufacture of heels or heel bases fromfibrous materials such as cellulose fiber and gumsfthe material beingmolded to form. It hasheretofore been attempted to do this byfillin themold with a loose mixture of fiber'and gums, waxes, resins, or asphaltsand then compacting it under heat and pressure. Heels or heel bases madein this manner have not proved to be satisfactory, however,

since, without an excessive amount of gums material may be whollyovercome, and satisfactory articles produced from the same material ifitis'fi'rst sheeted or felted to-.

getheras on apaper machine, a sufiicientnumber of lifts died out fromthe 1 sheet and assembledin superposed relation in a pressure, molded tothe desired shape. fThe lifts are condensed and fluxed togetherby thistreatment to a sufiicient extent to permit the formation of a concavityin the upper face of the heel or base to enga e the heel seat of theshoe and to take clear y the size imprint from the die without thenecessity of using a rand, although the extent of'reduction in volume ofthe material is much less than when it is attempted to com ress the'unfelted loose mixture tofinal orm. Not only is the stren hof thearticle very much increased by t is procedure, but its external finishis much improved, eliminating the necessity of performing any subsequentshaving operation thereon atter attaching it.

I mixtures thereof.v In place of the cellul osic 'to the shoe,-buflingandolishing only being required. When forme in thismanner 1t is alsopossible to employ relatively cheap .fibrous. -material and a relativelysmall amount of gums, thus"materially cheapening the product. It isfound also that. waste from the manufacture-0t box toe stifi'enerscomprising'fibrous material saturated withing ie.

molding press, andthen, under heat and a thermoplastic may be used toobtain the des red thermoplastic constituents with entlrely satisfactoryresults. A rubber heel may be readily vulcanized to the base made inthis, manner, ifdesired, or sired construction of top lift may beapplied thereto.

or a more complete understanding of this invention, reference may be hadto the accompanying drawings in which Figure 1 1s a perspective of apiece of sheet material formed on the paper ma chine showing lifts cuttherefrom. F gure 2 is a similar view of a lift. Figure3 is aperspectiveof a finished heel base pressed .up from a plurality of lifts.

F1 ure 4 is an elevatlon ofthe heel press- Figure5 is a section on line5 -5 of Figure 4. 1

F1gure6 is a section on line 6-6 of Figure 3,

I Figure 7 is an inverted pressure plate of the die.

plan of the upper ure 7. g V

The material which may be employed for constructing heels or-heelbasesaccording to this invention is sus'ceptibleof wide varia- Figure 8 is asection on line 8- -8 of Figmassncnusnrrs'assrouon 'ro nnoxwrrn MANU-any other detion, but as one example, the furnish to be sheeted may beas follows. phate pulp, 40 parts of box toe waste, 10, parts of Montanwax, and 4 parts of red oxide, are beaten up together for approxi matelythree hours. '5 parts of silicate of soda may then be added and beateninv for 60 parts of sul- 10 minutes, and 3 parts of alum then added andbeaten for 20 minutes,after which the furnish so formed is sheeted intoa board of materials mentioned, leather scrap may be employed. Forexample, the furnish may comprise 70 parts of leather, 30 parts of toewaste, beaten together hard for 3 ,hours,, 3 parts of silicate of sodabeaten in for I!) minutes, 2 parts of rosinsize beaten in for 10minutes, and 8 parts of alum beaten in such as rags, news,'orcombination the desired caliper fromwhich the heel lifts Y i for 20minutes. Of course any suitable pigments for coloringthe material maybeemployed with any of the furnishes, red oxide having been indicated inconnection with the furnish employing sulphate pulp. a Another furnishwhich has been found quite satisfa-ctorg news; 10 parts 0 sulphate pulp;5 parts of Montan wax; parts of toe waste; 8 partsof red oxide, beatenup together, afterwhich 2 parts of rosin size are .added andthen later 3parts of silicate-of soda and'then 8 parts of alum or other precipitant.l

In each of the furnishes above mentioned the waxes, gums, resins, orasphalts are fixed to'the fibrous material by the frosin size, orsilicate of soda, and the alum so that there is no difficulty in runningthe stock on the paper machine; The sheets thus formed are air dried andpreferablydiot calendered so as to bring a portioriof the thermo-plasticmaterials to the surface so that when lifts cut' from this material aresuperposed and pressed together, the exuded gums or resins tend to causethem to adhere.

The lifts 1 are cut from this sheet material shown at 2 in Figure 1 andarethen placed in superposed relation within a heated mold shown at 3 inFigures 45 and 5. This mold, as shown, comprises a block hollowed out tol the general shape of the sides and rear of of electric heating unitsinserted at suitable openings therein, as shown at 5/ Thebase of'themoldis formed of aplunger heacl6 shaped to conform to the cross section ofthe mold, this plunger head having a stern? extending therefrom andprojecting through an opening 8 in the block. provided for the purposeof permitting the head to be forced upwardlyto eject the finished heelor heelbase. an upper presser head 9 having its lower face convexed andprovided with size figures or other markings as 10 thereon in intaglio,as shown in Figures? and 8. This head is also preferably heated, aresistance unit 11 therein being shown for this purpose.

Afsuitable numberof lifts 1 having been placed within themold on thehead 6, the heated presser head 9 is then caused to press downwardly tocompress thelifts together between these heads. be on the order of athousand to two thou sand pounds per square inch, the mold being heatedto a temperature of approximately a 270? to300? F. This causestheliftstobe fiuxed together and condensed, the major comprises 504 partsofThis stem is The die also has,

This pressure should central portions of the lifts forinin a concavityin the upper face of the tinis red heel or base showing therein inrelief sharp impressions of the insignia on theupper presser head 9. Thecontour of this face is suitable for engagement with the heel seat ofthe shoe without the necessity of cutting and assembling with the liftsa separate rand strip, as is now necessary where coinparatively lowheels or heel basesare pressed up'from laminated material of the type*here'toforerused. It is necessary to exert this pressure in the moldfor only a few product; a t

is sheetedgon the paper n1achine,-it is-pos- 'sible to die out liftsfromtsheeted fibrous seconds in order to produce the proper materialmade ,up without theseconstituents,

to coat them with thermoplastic material such as Montan wax, superposethem in the heated molds-as hereinbefore described, and subject them topressure. In thisi'nethoc'l the Montan wax fluxes under the heat andpressure and is driven into the liftsto effect a more or less completesaturation thereof mum the product is substantially the same as thatproduced by the other methods hereinbe'fore described. 1 a

Having thus described certain exnbodiments of this invention itshould beevident to those skilled in the art that various changes andmodifications might be made there-in without departing from its spiritorscope as defined by the appended claims.

I.claim: i i

1. The method of .makingheels, which comprises superposing heel lifts offelted fibrous material and thermoplastic molding themvtogether underheat and pressure, and vulcanizing a rubber top lift thereto.

2. A heel comprising superposed lantiinations of felted fibrous materialand Montau wax fluxed and molded to form.

3. A heel comprising a base formed of superposed laminations of feltedfibrous ma terial and thermoplastic material fluxcd and molded to form,and a-rubber toplift vul canized to said base.

4. A heel comprisingsuperposed. lamina 5. A heel comprising superposedlamina tions of feltedfibrous material and boxtoe' waste, saidlaminations containing Montan wax and being fiuxed together and moldedto form.

'In test mony whereof I have aflixed my signature. i portion ofthecondensationoccurring at the ALBERT oLAPP.

